Illustrations: 1.D Corporation regularly borrows money from C Bank.S,the principal stockholder in D,offers to guarantee payment if C will increase the amounts lent.There is a bank custom to make such loans only on adequate collateral supplied by the borrower, and C promises S to follow the custom.S then executes a written agreement with C guaranteeing payment of future loans to D"with or without security."If the written agreement is a binding integrated agreement,C's prior promise is discharged. 制卧价贸易本岩 1951Illustrations: z 1. D Corporation regularly borrows money from C Bank. S, the principal stockholder in D, offers to guarantee payment if C will increase the amounts lent. There is a bank custom to make such loans only on adequate collateral supplied by the borrower, and C promises S to follow the custom. S then executes a written agreement with C guaranteeing payment of future loans to D "with or without security." If the written agreement is a binding integrated agreement, C's prior promise is discharged